DD28 Three-phase Watt-hour Meter

General The DD28 type single-phase watt-hour meter is a kind of induction meter, which is applicable to measure the rated frequency 50Hz and measurement of active electric energy in sigle-phase A.C electric net. Function and features 2.1 The meter has separable iron core structure; 2.2 The bearing has three kinds: single-jewel, dual jewel, magnetic floating; The case has three kinds; aluminum, plastic and glass; 2.3 The die-casting frame is allow aluminum with excellent mechanical strength. Specifications Type Accuracy Rated voltage (V) Rated current (A) Overload capacity Starting current Insulation performance DD282 2 220-240 2(4),2.5(5),3(6),5(10), 10(20),20(40),20(80) 200%Ib 0.5%Ib AC voltage 2KV for 1 min impulse voltage 6kV DD284 5(20),3(12),10(40), 15(60),20(80) 400%Ib